How to get ids of widget without setcontent view?

Question

I am new in android.I have a simple doubt,Is there any way to get id of a widget from some layout without set it as content view ?? I am looking to invisible a view from a class .I used the code

 View  b = findViewById(R.id.id2);
 b.setVisibility(View.GONE);

But error in "id",is it possible to get ids if widget from a java class without set as contentview ?? please help me. Thanks in advance :)

Answer 1

You can inflate the views separately and then use findViewById on the root of the inflated layout.

// inside of Activity, you can use 'this' for the context
LayoutInflater inflater = LayoutInflater.from(context);
View root = inflater.inflate(R.layout.some_layout);
// from your example
View b = root.findViewById(R.id.id2);
b.setVisibility(View.GONE);

At this point however these views are not part of your Activity's view hierarchy and will not be seen by the user. You will have to add them either by using setContentView(root) or by finding a ViewGroup in the current view hierarchy and calling viewGroup.addView(root).

Answer 2

You can do it this way

Button filterButton = new Button(YourActivity.this);
filterButton.setVisibility(filterButton.GONE);

Answer 3

onCreate(Bundle) is where you initialize your activity. Most importantly, here you will usually call setContentView(view) with a layout resource defining your UI, and using findViewById(int) to retrieve the widgets in that UI that you need to interact with programmatically.

See below link :-

Why findViewById() is returning null if setcontentview() is not called?

'But error in "id",is it possible to get ids if widget from a java class without set as contentview ?? '

You have to create dynamic view then you do not have need to call setcontentview.

how to set setContentView?

Is there a way to set setContentView(int id) dynamically?